How define the quanity of processes for MPICH program

[uter]

Here is my code for mPICH program. But it do not work.Should I
define the needed quantity of processes of 22 and 10 just from comamnd line--
cause I use the Code Block IDE.

#include "stdio.h"
#include <windows.h>
#include "mpi.h"
int main(int argc, char* argv[])
{
	int ProcNum1, ProcRank1;
	MPI_Init(&argc, &argv);
	MPI_Comm_size(MPI_COMM_WORLD, &ProcNum1);
	MPI_Comm_rank(MPI_COMM_WORLD, &ProcRank1);
	if (ProcRank1 == 0)
	{
		printf("Process %3d are receiving messages\n", ProcRank1);
		for (int i = 1; i < ProcNum1; i++)
		{
			int RecvRank1;
			MPI_Status Status;

			MPI_Recv(&RecvRank1, 1, MPI_INT, MPI_ANY_SOURCE,
				MPI_ANY_TAG, MPI_COMM_WORLD, &Status);
			printf("Message from process: %3d\n", RecvRank1);
		}
	}
	else
	{
		printf("Process %3d are sending message\n", ProcRank1);
		MPI_Send(&ProcRank1, 1, MPI_INT, 0, 0, MPI_COMM_WORLD);
	}
	MPI_Finalize();
	return 0;
}

Why do it return just 0 process. Is it due that I have x32 system and it should be x64?